Locking Executing Files: Windows does, Linux doesn"t. Why?

I noticed when a file is executed on Windows (.exe or .dll), it is locked and cannot be deleted, moved or modified.

Difference between binary semaphore and mutex

Is there any difference between binary semaphore and mutex or they are essentialy same?

PHP script - detect whether running under linux or Windows?

I have a PHP script that may be placed on a windows system or a linux system. I need to run different commands in either case.

Best OS to deploy a low latency Java application?

We have a low latency trading system (feed handlers, analytics, order entry) written in Java. It uses TCP and UDP extensively, it does not use Infiniband or other non-standard networking.

Detect 64-bit or 32-bit Windows from User Agent or Javascript?

I want to offer the right version of a download. The versions I have are: